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26 April 2024 |
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Nonreciprocal ground-state cooling of multiple mechanical resonators | | Deng-Gao Lai
; Jin-Feng Huang
; Xian-Li Yin
; Bang-Pin Hou
; Wenlin Li
; David Vitali
; Franco Nori
; Jie-Qiao Liao
; | | Date: |
29 Jul 2020 | | Abstract: | The simultaneous ground-state cooling of multiple degenerate or
near-degenerate mechanical modes coupled to a common cavity-field mode has
become an outstanding challenge in cavity optomechanics. This is because the
dark modes formed by these mechanical modes decouple from the cavity mode and
prevent extracting energy from the dark modes through the cooling channel of
the cavity mode. Here we propose a universal and reliable dark-mode-breaking
method to realize the simultaneous ground-state cooling of two degenerate or
nondegenerate mechanical modes by introducing a phasedependent phonon-exchange
interaction, which is used to form a loop-coupled configuration. We find an
asymmetrical cooling performance for the two mechanical modes and expound this
phenomenon based on the nonreciprocal energy transfer mechanism, which leads to
the directional flow of phonons between the two mechanical modes. We also
generalize this method to cool multiple mechanical modes. The physical
mechanism in this cooling scheme has general validity and this method can be
extended to break other dark-mode and dark-state effects in physics. | | Source: | arXiv, 2007.14851 | | Services: | Forum | Review | PDF | Favorites | |
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